# SDR SCNA99145

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 22, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N285SC
- Make and model: Boeing 727-2J4
- Registry model: [Boeing 727-2J4](https://openairdocs.org/model/boeing-727-2j4) (OpenAirDocs)
- Aircraft serial: 21676
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 7638101
- Condition: Failed
- Location: Cabin Pressure
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SCNA99145

## Discrepancy

DURING CLIMB, UNABLE TO CONTROL THE CABIN ALTITUDE.  LEAK CHECKED AIR CONDITIONING SYSTEM, NO LEAKS NOTED.  PRESSURIZED AIRCRAFT TO 3.0 PSI AND NO LEAKS NOTED.  REMOVED AND REPLACED CABIN PRESSURE CONTROLLER PER MM 21310.  SYSTEM OPERATIONALLY CHECKS NORMAL.

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